Abstract: A process for the monitoring of, in particular, the closing of a motor-operated aggregate, preferably for use in motor vehicles, for example a vehicle window or sliding roof. A motor which is connected to the vehicle electrical supply system is switched off by means of switching elements and/or a sensor which detects characteristic values of the aggregate and a data processing system including storage and comparing means. Switch off occurs during the closing process within a predetermined (central) portion of the closing travel, when a value dependent on the motor rpm or the speed of the aggregate exceeds a threshold value based on a stored reference value. A monitoring system is effective in the start-up phase of the motor. In the start-up phase of the motor, therefore, an initial threshold value based on a reference value detected towards the end of the previous adjustment process and then stored, is compared with the current motor period value.